Question

我有一个人物拍摄，一旦你触摸屏幕它就会一直亮着，但我希望它在你停止触摸屏幕时停止。现在，当您触摸屏幕时，它将开始拍摄，但是当您停止触摸屏幕时它不会停止。

override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent) {
    /* Called when a touch begins */
    for touch: AnyObject in touches {
        let location = touch.locationInNode(self)
        player.position.x = location.x
        var timer = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self, selector: Selector("spawnShot"), userInfo: nil, repeats: true)
    }
}

override func touchesEnded(touches: Set<NSObject>, withEvent: UIEvent){
    for touch: AnyObject in touches{
        var timer = NSTimer.scheduledTimerWithTimeInterval(0.5, target: self, selector: Selector("spawnShot"), userInfo: nil, repeats: false)
    }
}

Answer 1

要停止重复计时器，您需要使其无效，为此将timer保留为属性，然后在touchesBegan中进行计划，如果您想要停止计时器，则在您的情况下使其touchesEnded无效1}}方法，你可以这样invalidate计时器。

if self.timer.valid
        {
            self.timer.invalidate()
            self.timer = nil
        }

如何使用“NSTimer”停止拍摄

1 个答案: